From what I gather from you guys is that this is much more then just a rumor.
But why call it the PS4.5 though? The new hardware sony will need to use will be drastically more powerful then the current PS4 hardware. It'll be nothing like the current PS4. Why not wait a year and a half and just release the PS5? 14nm chips will be mainstream then, and they might even be able to use HBM. Allowing for a smaller form factor, better perf/watt and lower heat and stuff.
plus like @
Trave160 vid says console gamers would be less pissed if it's an entirely new system